If you're a parent, you've no doubt heard about The Wonder Weeks, written by Xaviera Plooij, Frans X. Plooij PhD, and Hetty van de Rijt PhD. The book outlines the 10 "wonder weeks" during infant development (which often cause sleep regressions), that all babies go through in the first 20 months of life. The book outlines when and why each "wonder week" happens; it also offers parents insights into how to help their babies navigate each wonder week, and turn it into a leap forward for baby. But,